JPS5960454A - Liquid developer apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a recording medium comprising at least one developer electrode coupled to a liquid developer transport device for visualizing each charged a-image on the recording material. Regarding equipment.

This type of liquid developer device is disclosed in West German Patent Application Publication No. 22.
33628.

In this device, an arcuate developer electrode is arranged at a predetermined distance from the recording material in the form of a P ram, resulting in the formation of a gap. A liquid developer is transported into this gap by a transport device to visualize the charged latent image present on the ram-shaped recording material.

The distance between the developer electrode and the drum-shaped recording material is adjusted by a distance adjusting device with sliding members or rotatable rollers. Said members or rollers are attached to both ends of the developer electrode so that a defined distance can be maintained between the recording material and the developer electrode. A spring is also provided by means of which the distance adjustment device is forced into contact with a ram-shaped recording material.

However, relatively high production costs are required to guarantee a constant distance between the recording material and the developer electrode.

DE 2337180 discloses a developer electrode for the cascade development of a charged latent image using a developer mixture. This electrode consists of a number of segments arranged close to the latent image area to be developed along the width of the latent image area at mutual intervals and inserted into parallel slots provided in the guide plate. Consists of an angular metal sheet with recessed lateral edges. Each sheet segment consists of a dam portion and an electrode portion forming an obtuse angle with this portion, and the dam portions of two adjacent segments of each interlock form a reservoir for developer mixture delivered from the top.

2 The developer electrode for powder developer mixtures according to West German Patent Application No. 2,164,494 (-U.S. Pat. No. 3,897,750) is pivotably mounted on an axis, with spacer members on both sides of the electrode. It is located in

Whether these known developer electrodes can be used for liquid or powder developer applications, it is necessary to maintain a gap between the developer electrode and the recording material carrying the charged latent image to be developed. It is common to the known electrodes that the necessary mechanical costs are high.

The object of the invention is to provide a developer electrode such that the distance to the recording material required for development is provided by the developer electrode without any additional means and is maintained automatically during the development process. It was to make a proposal.

For this purpose, the developer electrode is arranged in the frame of a pivotally mounted liquid developer device and fixed to the device in the vicinity of the outlet of the transfer device, and the At a distance from the developer electrode, the liquid developer flows over its back side with a layer thickness determined by the width of the outlet and the transfer pressure, such that the electrode floats over the layer of liquid developer. This is achieved by moving along the

In one embodiment of the invention, a suction plate, on which the recording material is present, is arranged in the frame, and the same frame is attached to the cylinder 10" with respect to the water 11".
-90' angle range.

The developer electrode is preferably made of plastic material and has a thickness of 30-120 μm. Preferably, the developer electrode is a 75 μm thick polyester film with a conductive coating. The conductive coating is vapor deposited aluminum.

An advantage of the invention is that the flexibility of the developer electrode allows it to float above a layer of liquid developer such that the thickness of said layer is such that the liquid developer can flow through a gap of a given width and length over its thickness. The point is that it is determined only by the pressure that is forced through it. The fixed distance between the developer electrode and the recording material with the charged image to be developed is determined by the thickness of the layer of liquid developer;
There is no need to provide expensive distance adjustment devices.

The invention will now be described in detail with reference to exemplary embodiments shown in the drawings.

The liquid developer device, shown in perspective view in FIG. 1 and in side view in FIG. 2, consists of a frame 3 in which a suction plate 8 is arranged. A transport device 4, which includes a slot die with an outlet 5 in the form of a gap, for example, is connected to a pump 10 installed in a trough 29 containing a supply air of liquid developer via W2O. The transport device 4 extends over the width of a recording material 6 which has on one side a charged latent image which is developed using a liquid developer. The recording material 6 may be, for example, a printing board or an electrophotographic circuit board, and the suction board 8
, and is pressed against the suction plate 8 by the vacuum applied to it.

A cylinder 9 is fixed to the bottom of the trough 29, and the piston of this cylinder 9 is indirectly connected to the underside of the frame 3. Since the frame 3 is pivotally attached to the trough 29, the inclination of the frame and thus of the recording material relative to the horizontal can be adjusted by extending the piston of the cylinder 9 in a range of about 10° to 90°.

The developer electrode 2 is fixed to the transfer device near the discharge port 5 of the transfer device. The transporter cow is moved along a guide rail 34 which is arranged at a distance from the frame 3 and extends longitudinally parallel to the same. A handle 35 is provided in the center of the transfer device for this movement.

The transport device 4 is arranged at a distance from the recording material 6 such that the developer electrode floats above a layer 7 of developer (the thickness of which depends on the gap width and the discharge pressure) discharged through the discharge opening 5. is passed along the same material. Thereby, during the development of the charged latent image, a layer of developer 7 corresponding to the thickness is formed between the developer electrode 2, which is normally maintained at a voltage of 50 to 150 μm, and the charged and exposed surface of the recording material 6. A certain distance can be maintained. The voltage applied to the developer electrode 2 is supplied by a voltage source 36 connected to the surface of the developer electrode 2 provided with a conductive coating.

The developer electrode 2 is, for example, an electrically conductively coated polyester film made of plastic material and having a thickness of 5 μm. The conductive layer on the polyester film consists of vapor deposited aluminum.

The embodiment of the liquid developer device illustrated in FIG. 3 differs from the embodiment according to FIG. 1 only with regard to the transport device 4, which in this case is moved manually along a guide rail. Instead, it is moved over the recording material G by a rack 37 driven by a motor 38 and meshing with a two-way transmission 39 mounted on the device.

It goes without saying that the previously undescribed possibility of moving the transport device along the recording material by means of a motor will be available to those skilled in the art with their expertise.

The embodiment of the liquid developer device illustrated in FIGS.
It allows simultaneous double-sided development of the recording material 12 held by the fixed frame 11.

This liquid developer device is designed symmetrically with respect to the vertical center line, and via a pressure pipe 30 the receiver is connected to a pump 17,18 arranged in the supply of liquid developer in the trough 25. It consists of two transfer devices 13 and 14. Each transfer device F'#l3, ]-4 has a slot die 19,2
has 0. The developer 1 ball poles 15, 16 are arranged below the 1:J1 outlet 21.22 of the slot die 19.20.

The fixed frame 11 is connected to the cylinder p'-3 at the top of the frame.
3, by means of which the fixed frame is vertically moved, immersed in the bath 23 and removed therefrom. The bath 23 is designed as a trough with an outlet 24 which is open at the L and through which excess liquid developer escapes into the receiving trough 25.

At the top of each slot die 19, 20 is a pressure pipe 31.3.
Air nozzle 26.2 coupled to pressure source 28 via 2
7 is placed.

The recording material 12, for example both u', +7 exposed printing plates, is developed by fixing the recording material 12 in a fixed frame, i2 L, and moving the same frame by means of a cylinder 33 in the 4ζ direction. The charged latent images present on both sides of the recording material 12 are developed by a layer of liquid developer applied to both surfaces of the recording material 120 through the outlets 21,22 of the slot die. This layer of liquid developer 15, 16 is floated in the manner described above with respect to FIGS. 1 and 2, such that the distance of said electrodes from the surface of the recording material is constant during the development process. Therefore, uniform development of the entire charge present on both surfaces of the recording material 12 is guaranteed. The slot dies 19, 20 are arranged near the top of the bath 23, and the brown halves of the developer electrodes 15, 16 protrude into the interior of the bath 23. The recording material 12 is immersed into the bath 23 immediately after passing through the slot die 19.20. The dimensions of the bath 23 are such that recording materials to be processed of all sizes can be completely immersed therein. Excess liquid developer flows from the surface of the recording material through the outlet 24 into the receiver trough (25). Once the recording material is completely immersed in the bath 23, a reverse movement of the piston of the /linder 33 is started and the fixed frame 11 with the recording material 12 is moved upwards. When the recording material 12 passes between the empty 2C nozzles 26, 27 arranged opposite to each other, excess liquid developer, which may still be present on the surface of the recording material, is removed by the air nozzle. The recording material 12 can be removed from the stationary frame 11 in a semi-moist state and without the risk of being stained by still depositing excess liquid developer, since it is removed by the blowing air stream, and the recording material 12 can be removed from the fixed frame 11 by e.g. Processing] Can be processed by applying two layers.

[Brief explanation of the drawing]

1 is a perspective view of an embodiment of the invention for single-sided development of recording materials, FIG. 21ffl is a side sectional view of the embodiment according to FIG. 1, and FIG. FIG. 5 is a perspective view of the actual fm fcQ, slightly modified in comparison; FIG. 5 is a perspective view of another embodiment for double-sided development of recording material; It is a side sectional view of an embodiment: 2; 15.16...developer electrode, 3...frame;
4; 13, 14... transfer device, 5; 21, 22...
Discharge [ko, 6; 12...Recording material, 7...Liquid developing and polishing I., L 9; 33...Cylinder, 10;
17,18...Pump, 19.20...Slot die, 21.22...υ1 output 1. ．． ．． ．． l, 23...
Bath, 24... outflow L], 2.5... receiving is trough, 2
6.27... Air nozzle, 28... Pressure source

Claims (1)

[Scope of Claims] 1. A liquid developer device for a recording material, comprising at least one developer electrode coupled to a liquid developer transport device for visualizing each charged latent image of a recording material, The developer electrode (2) is arranged on the frame (3) of the pivotally mounted liquid developer device (1) and connected to the transfer device (4).
) is fixed to the device near the discharge port (5), and the transfer device (4) is arranged so that the liquid developer discharged from the discharge port (5) has a layer thickness determined by the width of the discharge port and the transfer pressure. At some distance from the developer electrode (2) flowing over its back side, the same electrode (2) is moved along the recording material (6) in such a way that it floats over the layer of liquid developer (7). The liquid developer device described above is characterized in that: 2. A suction plate (8) on which the recording material (6) is present is arranged in the frame (3) and the force is applied to the frame (3).
10 to 90 horizontally by Ka cylinder (9)
Claim 1: 1.
& equipment. 3. The device according to claim 1, wherein the developer electrode (2) is made of plasticine material and has a thickness of 30 to 120 .mu.m. 4. The device according to claim 3, wherein the developer electrode (2) is a polyester film coated with a conductive film and has a thickness of 75 μm. 5. The device of claim 4, wherein AM aluminum constitutes the conductive coating of the polyester film. 6. The transfer device (4) is equipped with a slot die and is movable along the frame (3) and has a pump (1)
0) The apparatus according to claim 1, wherein the liquid developer is supplied by the apparatus according to claim 1. 7. In order to visualize each charged latent image of "recording material" 2
) in which a vertically movable fixed frame (11) is used for recording materials having charged latent images on both sides. Transfer devices (13, 14) are provided to support the material and are installed on both sides of the moving path of the fixed frame (11) at a distance from the moving path,
The developer electrode (15, 16) includes the developer electrode (15, 16), the pump (17, 18) and the slot die (19, 20).
5, 16) are fixed to the slot die (19, 20) at the bottom of the discharge port (21, 22), and the recording material (12
) is immersed in the chamber uniform bath (23) during development.
) The liquid developer device described above, characterized in that it is disposed at the lower part of the yfi slot die (19, 20). 8 In a liquid developer device for recording materials consisting of at least one developer electrode combined with a liquid developer transport device for visualizing the charged latent image on the recording material, a bath (23
), the receiver has an outlet (24) leading to the trough (25).
). 9. Recording consisting of at least one developer electrode combined with a liquid developer transport device for visualizing each charged latent image on the recording material (in an optical liquid developer device, each slot die (19 , 20) are provided with air nozzles (26, 27) connected to a pressure source (28), the recording material (12) facing each other through the air nozzles (26, 27).
26, 27) and which may be present on the surface of the recording material after development is removed by an air stream blown by the air nozzles (26, 27). The liquid developer device described above.